Punch aligning lens



Aug. 26; 1947.

R. v. WOOD. ,P-UNCH LENS- ALIGN ING Filed Jan. 12, 1946 Patented Aug.26, 1947 UNITED STATES 11 Claims.

This invention relates to a punch aligning lens for usei'n makingtneinitial punch marks on a sheet of metal whichisto-be drilled and cut toformirregular shapes.

In making templets or patterns for cutting irregular shapes or formaking short runs of those shapes themselves, the common practice is todraw the desired shape with a scratch line on a sheet oi metal. It isthen the practice to drill holes quite close together to one side ofthis scratch linean-d then tobreak out'the part along the holed line. Itis desired to have the holes as close together as practicable and it iswell known that the drill tends to run sidewise, into the adjacenth01,*l11'11$5 the plate is initially punched to guide the drill.Anexperienced workman can place the punch mares near. to, the scratchline and closely adjacent eneanother so that the drilling may beaccurately done,

I-he "lens or" the instant invention enables the inesper-ienced -;andthose with little mechanical ability topl ace the-punch marks evenlyclose to th scratc-hline andtc-evenly space them with respect to oneanother as accurately as the es- ;cerienced mechanic cando. 'The lens ofthe instant invention alscenables the experienced mechanic lt-o lineupthe punchholes much more quickly and accurately.

The -le-ns,:is primarily a right cylinder with a spherical -=top, andwith a hole through its axis which serves as a uide tor a punch. A smallcircle or other index is inscribed on the bottom of the right cylinder,the'mag'nified bottom of the hole also serves asgan index. The lens isplaced on the pattern so that the operators eye is substantially in linewith the punch and magnified bottom hole index is placed inregisti'cn'will be a parent from the description and I the accompanyingdrawing forming apart hereter with the scratch line on the pattern andthen the punch is given a light tap with a hammer. The lens may then bemoved around the pattern curve, placing the circle index on thepreceding mark, and the hole index again lined up with the scratch lineand another tap is given the punch. By this operation of successivelyaligning th index with the pattern curve, successi e punch marks may beplaced on the pattern the desired space apart and the desired distancefrom the scratch line, The spherical top of the lens magnifies thescratch line and the indices to make it easy to bring them into accurateregister, and the lens itself holds the punch in exact verticalalignment with the plane of the pattern to always 7 direct th punchexactly Where the lens has located it.

Other objects and advantages of the invenof and in which:

. Figure 1 is a side elevaticn of the lens and punch.

Figure 2 is an enlarged vertical sectional view of the lens placed upona pattern.

Figure 3 is a top plan view of the lens of Fi-gure 2.

Figure 'isan'inverted plan View of the lens of Figure 2.

Figure 5 is a sectional View of the lens and punch'oi Figure '2 on line5-5.

Figure 6 is a tap plan view of a pattern showing the lens in operation.

Figure 7 is a fragmentary plan View similar to Figure 6.

Figure 8 is a fragmentary plan view or "a pattern after drilling.

In the drawing similar-numerals refer to similar parts througl'ieut theseveral views.

' The right-cylinder lens l a cylindrical body 2, and aspherical topEwi-th ehole Q drilled through its axis. Through this hole passes apunch member ii i a hardened point :6. The "punch ii closely fits thehole to accurately guide th 0n the ba-se the lens is cut out at 'l' toforma down rardiy projecting circular 1pcrtion ii, which. is angles tothe axis of the lens and which forms a for the lens on a pattern whichis precisely at right angles to the of the lens. Within the circularportion of the lens at l is inscribed or cut fa circle the diameter 'ofwhichis abeut-twiee that of hole A-sheetmeta1 plateill has th outline iiof the templet or pattern scratched thereon of the particular patternshown. It is desired to cut out line H and again place the bottom of thehole 4 tangentially to the line II and with the circle 9 over the priorpunch mark and again hammer the punch to make an impression on the plateI0. He is guided in the distance of the punch marks apart by placing thepreceding punch mark on the circle 9. g This spacing of the punch markswith respect to one another and from the line H is substantially thatneeded to space the drill holes apart the desired amount, and thedesired amount from the line I I.

The spherical top of the lens greatly enlarges the bottom of hole 4, the-circle 9 and the line H, and also the preceding punch marks to makethem easy to locate and thereby the lens enables an accurate spacing ofthe punch indentations with respect to one another and the scratch lineIn Figure 3 the circle 9 is shown enlarged as it appears through the topof the lens. The actual size of the same circle 9, on the enlarged scaleof Figures 2, i, and 5, is shown at 9. The lines formed by the stepbetween the base support 8 and the underside of the lens I are sorefracted by the lens as to be outside the line of vision of theoperator looking vertically downwardly upon the lens. He does not seethese lines forming the base. He only sees the enlarged bottom of hole 4and circle or index 9. In Figures 6 and. '7 the line I l, as it isviewed through the lens, is shown displaced outside the line H, withthemagnified bottom of hole 4 tangent to it.

After punching the holes in the plate with the punch of the invention,the sheet may then be drilled out, leaving holes 12 therein, accuratelyspaced apart and accurately spaced from the line H along the drill line.The inside portion of the sheet I may then be broken out.

Various materials and combinations of materials may obviously be used tomake the lens of the invention, and various modifications may be made inthe shape of the lens and the location of its magnifying sphericalsection and other changes may be made without departing from theinvention.

What is claimed as new and is desired to be secured by Letters Patentis:

1. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, and a base on said lens tosupport the lens with its axis vertical to a plane.

2. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and an index oflocation on said lens, said index being magnified by said lens.

3. An aligning lens having a punch hole through, the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupportv the lens with its axis vertical to a plane, and means on saidlens whereby its location with re- 4 spect to indicia in said plane maybe determined, said means being magnified by said lens.

4. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and an index oflocation on the base side of said lens.

5. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens to support the lens with its axis vertical to a plane, and a circular index oflocation on said lens, said index being magnified by said lens.

6. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and a circular indexof location on said lens; concentric to the axis thereof,'said indexbeing magnified by said lens.

7. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and a circular indexof location on the base side of said lens.

8. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and a circular indexof location on the base side of said lens, concentric to the axisthereof.

9. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport thelens with its axis vertical to a plane, and means on the baseside of said lens whereby its location with respect to indicia in saidplane may be determined.

10. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and. circular meanson the base side of said lens whereby its location with respect toindicia in said plane may be determined.

11. An aligning lens having a punch hole through the axis thereof, apunch slidable in and guided by said hole, a base on said lens tosupport the lens with its axis vertical to a plane, and circular meanson said lens concentric. with the axis thereof and magnified by saidlens whereby the location of the lens with respect to indicia

